* {
    padding: 0;
    margin: 0;
}

body {
    zoom: 1.2;
}


/* 最大的盒子 */

#box {
    width: 800px;
    height: 500px;
    margin: 0 auto 0 auto;
    position: relative;
    overflow: hidden;
    background: url("img/back2.jpg");
}


/* 小鸟 */

#bird {
    width: 50px;
    height: 50px;
    position: absolute;
    left: 200px;
}


/* 上面的竹子 */

.zhuz1 {
    width: 70px;
    height: 300px;
    background: url("img/zhuzi4.png");
    position: absolute;
    left: 800px;
}


/* 下面的竹子 */

.zhuz2 {
    width: 70px;
    height: 300px;
    background: url("img/zhuzi5.png");
    position: absolute;
    left: 800px;
}


/* 初始页面的盒子 */

#big {
    width: 100%;
    height: 100%;
}


/*标题*/

#big_bt {
    width: 100%;
    height: 50px;
    color: #ff5500;
    font-weight: bold;
    font-size: 40px;
    float: left;
    margin: 45px auto 0 auto;
    text-align: center;
}


/* 鼠标键盘操作的按钮 */

.an {
    width: 130px;
    height: 40px;
    background: #FD6D25;
    border-radius: 10px;
    cursor: pointer;
    line-height: 40px;
    text-align: center;
    color: #eeeeee;
    margin: 90px 20px 0px 170px;
    font-size: 16px;
    float: left;
}

.an:hover {
    background: #fd9854;
}


/* 初始页面的说明 */

#big_sm {
    width: 500px;
    height: 120px;
    background: #ffffff;
    border-radius: 15px;
    font-size: 18px;
    margin: 100px auto auto 125px;
    padding: 20px;
    float: left;
    opacity: 0.5;
    color: black;
}


/* 死亡后的页面 */

#over {
    width: 100%;
    height: 100%;
    background: black;
    opacity: 0.7;
    color: #ffffff;
    font-size: 50px;
    text-align: center;
    padding-top: 100px;
    display: none;
    position: absolute;
    z-index: 10;
    top: -600px;
}


/* 死亡后页面显示的分数 */

#ndfen {
    width: 100%;
    height: 40px;
    line-height: 40px;
    text-align: center;
    color: #eeeeee;
    margin: 50px auto;
    font-size: 18px;
}


/* 重新开始 */

#rest {
    width: 130px;
    height: 40px;
    cursor: pointer;
    line-height: 40px;
    text-align: center;
    color: #eeeeee;
    margin: 0px auto;
    font-size: 20px;
}


/* 鼠标的点击按钮 */

#dian {
    width: 70px;
    height: 70px;
    border-radius: 50px;
    background: #FD6D25;
    cursor: pointer;
    line-height: 100px;
    text-align: center;
    font-size: 25px;
}


/* 按钮的外面套的盒子 */

#anniu {
    margin: 430px 0 0px 365px;
    text-align: center;
    display: none;
    position: absolute;
    z-index: 7;
}


/* 左上角的分数 */

#fen {
    width: 80px;
    height: 40px;
    border: 3px solid #4b7a66;
    border-radius: 5px;
    color: #ff5500;
    font-size: 25px;
    text-align: center;
    line-height: 40px;
    font-weight: bolder;
    margin: 5px;
    position: absolute;
    z-index: 9;
    display: none;
}